Genesis I.C.E. Genesis 5.2 - Manual (Page 19)

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driver is a perfect piston within the frequencies used. Thus, low cone
break-up distortion is inherent in the driver designed for the G5.2.
Unlike the mid-bass couplers, midrange and the tweeters, which
operate in dipole, the three woofers in the G5.2 operate in phase as
an omni-pole. All three woofers work in phase to control the air mass
of the listening room. This means that the surface area of the three
cones and the loudspeaker enclosure all work in unison to produce
bass output that descends evenly to below your hearing limits.
500 watt Class D Servo Amplifier
While the advantages of metal cones include extreme stiffness
resulting in very low distortion and break-up, one problem is that of
greater mass. To over come this, Genesis had to build an
amplification system of great wattage, and high damping factor. The
servo system also places extraordinary demands on the amplifier
because the system uses enormous amounts of current to make the
woofer follow the input signal. Combined with the metal cones, this
means that the amplifier used must deliver extraordinarily large
amounts of clean power.
In the Genesis 5.2, the built-in amplifier was specifically designed
and tuned for low frequencies in order to produce “floorshakingly
musical” bass to power the servo woofers.
One side benefit of this powered woofer system is that almost any
sized amplifier can be used to drive the Genesis 5.2. No longer must
one choose between having an amplifier with enough power to drive
the woofers, and a smaller amplifier having better spatial and tonal
characters. Nevertheless, we generally recommend 60 watts as a
minimum.